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This is a great introduction to the concept of lack of precision (ie error) in measurements. It is unlikely that your volumes are exactly 5 mL and 6 mL or that your protein concentrations are exactly 20 mg/mL and 18 mg/mL. The errors in these measurements combine to give different calculated protein amounts even though the protein amounts are presumably the ...


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Distilling your own spirits is fine and legal as long as you make no more than five gallons of finished ethanol. Anyways, you just need to throw out the first ounce or two of distillate if small scale, up two 4oz if large scale. That will be mostly methanol, other than that just be careful and God bless chemistry!


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